No problem, we've got 64473020 and 77925821 to multiply
64473020 × 77925821 = 77925821 × (64473020)
+ 77925821 × 0 resulting in 0
+ 77925821 × 20 producing 1558516420
+ 77925821 × 000 that results in 0
+ 77925821 × 3000 producing 233777463000
+ 77925821 × 70000 what gives us 5454807470000
+ 77925821 × 400000 which equals 31170328400000
+ 77925821 × 4000000 giving us 311703284000000
+ 77925821 × 60000000 what gives us 4675549260000000

= 5024113015849420
